## Treatise on materials science and technology, Volume 3 |

### From inside the book

Results 1-3 of 21

Page 139

He evaluated the fourth- order elastic constants of NaCl from the temperature

coefficients of the second- order elastic constants and found good agreement

with fourth-order constants calculated, using the assumption that only the

exchange interaction contributes to these constants. Hall (245) used an

ultrasonic pulse-echo technique to measure the temperature dependence of the

second-order

silicon and doped «-type ...

He evaluated the fourth- order elastic constants of NaCl from the temperature

coefficients of the second- order elastic constants and found good agreement

with fourth-order constants calculated, using the assumption that only the

exchange interaction contributes to these constants. Hall (245) used an

ultrasonic pulse-echo technique to measure the temperature dependence of the

second-order

**elastic moduli**and the 25° C third-order**elastic moduli**for puresilicon and doped «-type ...

Page 142

From the experimental measurements, three combinations of third- order moduli

were evaluated, namely, #3 [100] = c11l *3 [1 10] = i(c, 11 +3c, 12+ 12c166) (387)

tf3[1ll] = i(c,11 + 6c112 + 12c144 + 24c166 + 2c123+16c456) as shown

previously by Eqs. (284), (303), and (3 1 7), respectively. In 1970, Meeks and

Arnold (264) used the same method to determine the influence of temperature

over the range 106°-300°K on the combinations of third-order

strontium titanate ...

From the experimental measurements, three combinations of third- order moduli

were evaluated, namely, #3 [100] = c11l *3 [1 10] = i(c, 11 +3c, 12+ 12c166) (387)

tf3[1ll] = i(c,11 + 6c112 + 12c144 + 24c166 + 2c123+16c456) as shown

previously by Eqs. (284), (303), and (3 1 7), respectively. In 1970, Meeks and

Arnold (264) used the same method to determine the influence of temperature

over the range 106°-300°K on the combinations of third-order

**elastic moduli**ofstrontium titanate ...

Page 143

These measurements were used to determine two of the third-order

order elastic constants for single-crystal NaCl. In 1971, Peters and Arnold (270)

used the ultrasonic harmonic generation technique and measured the

amplitudes of the fundamental and third harmonic waves in strontium titanate

single crystals. The amplitude of the third harmonic was found experimentally to

vary as the cube of the ...

These measurements were used to determine two of the third-order

**elastic****moduli**of fused silica and two ratios of linear combinations of second- and third-order elastic constants for single-crystal NaCl. In 1971, Peters and Arnold (270)

used the ultrasonic harmonic generation technique and measured the

amplitudes of the fundamental and third harmonic waves in strontium titanate

single crystals. The amplitude of the third harmonic was found experimentally to

vary as the cube of the ...

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